Get off off rails-assets

Just moving the things we currently use (and should drop in the ASAP) to vendor/assets

vendor/assets/javascripts/holderjs/test/index.js

@@ -0,0 +1,19 @@
+var runner = require('./runner');
+var server = require('node-http-server');
+
+server.deploy({
+    'port': 8000,
+    'root': __dirname
+});
+
+runner({
+    'browserName': 'chrome'
+}, function (err, retval) {
+    console.log('Test result: ', retval);
+
+    if (!retval) {
+        process.exitCode = -1;
+    }
+
+    process.exit();
+});